Cura/serialCommunication.py

   1 """
   2 Serial communication with the printer for printing is done from a separate process,
   3 this to ensure that the PIL does not block the serial printing.
   4
   5 This file is the 2nd process that is started to handle communication with the printer.
   6 And handles all communication with the initial process.
   7 """
   8
   9 __copyright__ = "Copyright (C) 2013 David Braam - Released under terms of the AGPLv3 License"
  10 import sys
  11 import time
  12 import os
  13 import json
  14
  15 from Cura.util import machineCom
  16
  17 class serialComm(object):
  18         """
  19         The serialComm class is the interface class which handles the communication between stdin/stdout and the machineCom class.
  20         This interface class is used to run the (USB) serial communication in a different process then the GUI.
  21         """
  22         def __init__(self, portName):
  23                 self._comm = None
  24                 self._gcodeList = []
  25
  26                 self._comm = machineCom.MachineCom(portName, callbackObject=self)
  27
  28         def mcLog(self, message):
  29                 sys.stdout.write('log:%s\n' % (message))
  30
  31         def mcTempUpdate(self, temp, bedTemp, targetTemp, bedTargetTemp):
  32                 sys.stdout.write('temp:%s:%s:%f:%f\n' % (json.dumps(temp), json.dumps(targetTemp), bedTemp, bedTargetTemp))
  33
  34         def mcStateChange(self, state):
  35                 if self._comm is None:
  36                         return
  37                 sys.stdout.write('state:%d:%s\n' % (state, self._comm.getStateString()))
  38
  39         def mcMessage(self, message):
  40                 sys.stdout.write('message:%s\n' % (message))
  41
  42         def mcProgress(self, lineNr):
  43                 sys.stdout.write('progress:%d\n' % (lineNr))
  44
  45         def mcZChange(self, newZ):
  46                 sys.stdout.write('changeZ:%d\n' % (newZ))
  47
  48         def monitorStdin(self):
  49                 while not self._comm.isClosed():
  50                         line = sys.stdin.readline().strip()
  51                         line = line.split(':', 1)
  52                         if line[0] == 'STOP':
  53                                 self._comm.cancelPrint()
  54                                 self._gcodeList = ['M110']
  55                         elif line[0] == 'G':
  56                                 self._gcodeList.append(line[1])
  57                         elif line[0] == 'C':
  58                                 self._comm.sendCommand(line[1])
  59                         elif line[0] == 'START':
  60                                 self._comm.printGCode(self._gcodeList)
  61                         else:
  62                                 sys.stderr.write(str(line))
  63
  64 def startMonitor(portName):
  65         sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0)
  66         comm = serialComm(portName)
  67         comm.monitorStdin()
  68
  69 def main():
  70         if len(sys.argv) != 2:
  71                 return
  72         portName = sys.argv[1]
  73         startMonitor(portName)
  74
  75 if __name__ == '__main__':
  76         main()